◎ 题干
They were abroad during the months when we were carrying out the investigation, or they _____ to our help.
A.would have come B.could come C.have come D.had come
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“They were abroad during the months when we were carrying out the investigation, or they _____ to our help.A.would have comeB.could comeC.have comeD.had come…”主要考查了你对  【虚拟语气】【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。